The map's pillars section draws §5's row and badge, and .map-pillars leaves the markup while its id stays #4314

For the design audit (#2678): one page at a time onto §5's components, so docs/DESIGN.md §5d only shrinks. This is one third of #4238, which the crew parked twice: both pulls went red on test/limbs.test.ts › "limb actions › defer…". Before you push, run the whole of test/limbs.test.ts: if it is red, it is the counts line's regex at :455, which #4238's counts part (a sibling of this issue) owns. Do not touch the counts line here.

Done:

• [ ] The pillars section (<section class="map-list map-pillars" id="map-pillars"> in src/web/pages/map.ts) draws each pillar with §5's row and a badge for its open / ready / blocked counts. .map-pillars appears nowhere in the HTML; id="map-pillars" stays, because test/pillars.test.ts:395 and :656 and the page's links read it. Leave .map-list to #4292.
• [ ] Do not delete the rules from src/web/pages/map.ts's stylesheet and do not edit docs/DESIGN.md: #4239 does that once all three parts land.
• [ ] Nothing a person reads or taps is lost. A test asserts the old name is absent and the words, links and controls are present.

Files: src/web/pages/map.ts, a test. Before pushing, run bun x tsc --noEmit, bun scripts/design-lint.ts, bun test test/design-lint.test.ts test/limbs.test.ts test/pillars.test.ts and the map's tests. All of them must be green. No screenshots: the sandbox has no browser.